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MCQOPTIONS
This section includes 1134 Mcqs, each offering curated multiple-choice questions to sharpen your Grade10 knowledge and support exam preparation. Choose a topic below to get started.
| 751. |
To store a large amount of charge at relatively low voltage, we use |
| A. | ceramic capacitors |
| B. | fixed capacitors |
| C. | parallel plate capacitors |
| D. | electrolytic capacitors |
| Answer» E. | |
| 752. |
One micro coulomb is equal to |
| A. | 10-6 |
| B. | 10-8 |
| C. | 10-4 |
| D. | 10-9 |
| Answer» B. 10-8 | |
| 753. |
3 capacitors with capacitances 5µF, 6µF and 7µF are arranged in parallel combination with a battery of 5V, as 1µF = 10-6F, the total capacitance should be |
| A. | 18 µF |
| B. | 20 µF |
| C. | 12 µF |
| D. | 40 µF |
| Answer» B. 20 µF | |
| 754. |
The electrostatic force acting on two charges of 1C separated by 1m is about |
| A. | 4×109 |
| B. | 6×109 |
| C. | 8×109 |
| D. | 9×109 |
| Answer» E. | |
| 755. |
Paper capacitor and mica capacitor are the examples of |
| A. | ceramic capacitors |
| B. | fixed capacitors |
| C. | parallel plate capacitors |
| D. | electrolytic capacitors |
| Answer» C. parallel plate capacitors | |
| 756. |
The basic property of material body due to which it attracts or repels another object is called |
| A. | induction |
| B. | repulsion |
| C. | capacity |
| D. | charge |
| Answer» E. | |
| 757. |
If q1 and q2 are the magnitudes of two charges, r is the distance between the two charges, k is the constant of proportionality then coulomb's force F between the two charges is equal to |
| A. | k(q1q2)/r&sub2; |
| B. | k(q1q2)/r |
| C. | k(q1q2) + r&sub2; |
| D. | k(q1q2) + r |
| Answer» B. k(q1q2)/r | |
| 758. |
A glass rod rubbed with silk thread is |
| A. | positively charged |
| B. | negatively charged |
| C. | not charged |
| D. | dual charged |
| Answer» B. negatively charged | |
| 759. |
In the combination of parallel capacitors, the left plate of each capacitor is connected to the battery's |
| A. | no terminal |
| B. | both negative and positive terminals |
| C. | negative terminal |
| D. | positive terminal |
| Answer» E. | |
| 760. |
A capacitor holds 0.06 C of charge when fully charged by a 9V battery. The capacitance of the capacitor is |
| A. | 6.67 × 10-3 |
| B. | 5 × 10-3 |
| C. | 3.58 × 10-3 |
| D. | 2.68 × 10-3 |
| Answer» B. 5 × 10-3 | |
| 761. |
An amplifier amplifies the signal without changing its |
| A. | shape |
| B. | size |
| C. | frequency |
| D. | wavelength |
| Answer» B. size | |
| 762. |
Digital quantities are expressed in the form of |
| A. | numbers only |
| B. | digits only |
| C. | signals |
| D. | numbers and digits |
| Answer» E. | |
| 763. |
The degree of deflection of electrons from their original direction is proportional to the applied |
| A. | electrics field's strength |
| B. | electrics field's weakness |
| C. | potential difference |
| D. | magnetic field |
| Answer» B. electrics field's weakness | |
| 764. |
Material which gives light as a result of bombardment of fast-moving electrons is |
| A. | Carbon |
| B. | Graphene |
| C. | Potassium |
| D. | Phosphorus |
| Answer» E. | |
| 765. |
Digital electronic devices store and process electronically |
| A. | tits |
| B. | bits |
| C. | fits |
| D. | fytes |
| Answer» C. fits | |
| 766. |
The size of the image depends on the position of the object in |
| A. | plane mirror |
| B. | convex mirror |
| C. | concave mirror |
| D. | silver mirror |
| Answer» D. silver mirror | |
| 767. |
The minimum distance of an object from the eye at which it produces a sharp image on the retina is known as |
| A. | accommodation |
| B. | near point |
| C. | far point |
| D. | hypermetropia |
| Answer» C. far point | |
| 768. |
The core is made of glass or plastic of relatively |
| A. | zero refractive index |
| B. | high refractive index |
| C. | low refractive index |
| D. | no refractive index |
| Answer» C. low refractive index | |
| 769. |
A convex lens of focal length 8 cm is to be used to form a virtual image 2 times the size of the object. Where must the lens be placed? |
| A. | 3 cm |
| B. | 4 cm |
| C. | 5 cm |
| D. | 8 cm |
| Answer» C. 5 cm | |
| 770. |
A telescope that uses two converging lenses is called |
| A. | reflecting telescope |
| B. | refracting telescope |
| C. | simple telescope |
| D. | compound microscope |
| Answer» C. simple telescope | |
| 771. |
The direction of the force on a current-carrying wire in a magnetic field can be found by using |
| A. | left hand grip rule |
| B. | right hand grip rule |
| C. | Fleming's left hand rule |
| D. | Fleming's right hand rule |
| Answer» C. Fleming's left hand rule | |
| 772. |
An electrical switch that opens and closes under the control of another electrical circuit is called |
| A. | fuse |
| B. | relay |
| C. | breaker |
| D. | transformer |
| Answer» C. breaker | |
| 773. |
Generators produce electric current due to the movement of wires near |
| A. | metals |
| B. | small magnets |
| C. | very large magnets |
| D. | gases |
| Answer» D. gases | |
| 774. |
A step done transformer has a turns ratio of 100: 1. An ac voltage of amplitude 170 V is applied to the primary. If the current is 1 mA in the primary, the current in the secondary should be |
| A. | 0.5 A |
| B. | 0.1 A |
| C. | 0.2 A |
| D. | 0.6 A |
| Answer» C. 0.2 A | |
| 775. |
At city substation, the AC is stepped down to |
| A. | 130 V |
| B. | 120 V |
| C. | 320 V |
| D. | 220 V |
| Answer» E. | |
| 776. |
In the presence of a charged body, an insulated conductor develops a positive charge at one end and a negative charge at another end. This process is called |
| A. | magnetic induction |
| B. | electrostatic induction |
| C. | chemical induction |
| D. | capacity |
| Answer» C. chemical induction | |
| 777. |
The ability of a capacitor to store charge is affected by |
| A. | area of the plates |
| B. | distance between the plates |
| C. | type of insulators used |
| D. | all of above |
| Answer» E. | |
| 778. |
In coulomb's law, the force of attraction or repulsion between two charges is |
| A. | inversely proportional to charges |
| B. | directly proportional to product of charges |
| C. | directly proportional to square of distance between them |
| D. | Inversely proportional to distance between them |
| Answer» C. directly proportional to square of distance between them | |
| 779. |
If one negative particle is 1.6×10-19, then the charge of how many particles would be equal to 100µC? |
| A. | 7.25×1014 |
| B. | 6.25×107 |
| C. | 6.25×1014 |
| D. | 8.35×1014 |
| Answer» D. 8.35×1014 | |
| 780. |
If 1 joule of work is done against the electric field in bringing 1C positive charge from infinity to a point in the electric field then the potential at that point will be |
| A. | 1/2 volt |
| B. | 1 volt |
| C. | 2 volt |
| D. | 3 volt |
| Answer» C. 2 volt | |
| 781. |
One side of the spherical mirror is opaque and the other side is |
| A. | non reflecting |
| B. | translucent |
| C. | transparent |
| D. | reflecting |
| Answer» E. | |
| 782. |
If a concave lens has a focal length of 15 cm and image distance is 10 cm then object distance is |
| A. | 30 cm |
| B. | 50 cm |
| C. | 40 cm |
| D. | 60 cm |
| Answer» B. 50 cm | |
| 783. |
The mirror formula is |
| A. | 1 ⁄ f + 1 ⁄ p + 1 ⁄ q< |
| B. | 1 ⁄ f = 1 ⁄ p + 1 ⁄ q< |
| C. | 1 ⁄ p + 1 ⁄ q |
| D. | 1 ⁄ p = 1 ⁄ f x 1 ⁄ q< |
| Answer» C. 1 ⁄ p + 1 ⁄ q | |
| 784. |
If fo is the focal length of the objective and fe is the focal length of the eyepiece, then magnification of a refracting (M) telescope can be determined as |
| A. | M = fo/fe |
| B. | M = fo + fe |
| C. | M = fo - fe |
| D. | M = fe/fo |
| Answer» B. M = fo + fe | |
| 785. |
The distance between the optical center and principal focus is |
| A. | radius |
| B. | focal length |
| C. | linear length |
| D. | 2 focal lengths |
| Answer» C. linear length | |
| 786. |
If the object is at focal length and it is positive then the mirror is |
| A. | concave mirror |
| B. | convex mirror |
| C. | concave lens |
| D. | convex lens |
| Answer» B. convex mirror | |
| 787. |
A mirror whose polished, reflecting surface is a part of a hollow sphere of glass or plastic is known as |
| A. | plane mirror |
| B. | virtual mirror |
| C. | silver mirror |
| D. | spherical mirror |
| Answer» E. | |
| 788. |
If the object is towards the right side of the lens, it is said to be |
| A. | real object |
| B. | virtual object |
| C. | small object |
| D. | thick object |
| Answer» C. small object | |
| 789. |
The disability of the eye to form distinct images of nearby objects on its retina is known as |
| A. | nearsightedness |
| B. | farsightedness |
| C. | stress |
| D. | accommodation |
| Answer» D. accommodation | |
| 790. |
The lens which is thin at the center but thick at the edges is called |
| A. | counter lens |
| B. | fiber lens |
| C. | convex lens |
| D. | concave lens |
| Answer» E. | |
| 791. |
Waves of visible light have |
| A. | higher frequency than radio waves |
| B. | lower frequency than radio waves |
| C. | frequency equal to radio waves |
| D. | wavelength equal to radio waves |
| Answer» B. lower frequency than radio waves | |
| 792. |
In radio, television and cell phone information is sent either through optical fibers in the form of |
| A. | cathode rays |
| B. | electric signals |
| C. | light |
| D. | electromagnet waves |
| Answer» D. electromagnet waves | |
| 793. |
On the internet, the function which allows people to send and receive text messages very fast is called |
| A. | web browsing |
| B. | |
| C. | e-commerce |
| D. | post |
| Answer» C. e-commerce | |
| 794. |
Light reflects into the fiber optics if the angle of incidence is |
| A. | less than the critical angle |
| B. | greater than the critical angle |
| C. | equal to the critical angle |
| D. | none of above |
| Answer» C. equal to the critical angle | |
| 795. |
An electronic computing machine used for adding, subtracting or multiplying is known as |
| A. | fax machine |
| B. | computer |
| C. | photo phone |
| D. | cell phone |
| Answer» C. photo phone | |
| 796. |
We can develop any document and see it on the screen after typing by using |
| A. | operating system |
| B. | word processing |
| C. | data management |
| D. | managing system |
| Answer» C. data management | |
| 797. |
The software that manages your computer and the devices connected to it is termed as |
| A. | read only memory |
| B. | microprocessor |
| C. | operating system |
| D. | managing system |
| Answer» E. | |
| 798. |
The wires used to transmit electric signals such as cable TV to our homes are called |
| A. | coaxial cable |
| B. | optical cable |
| C. | cathode cable |
| D. | glass cable |
| Answer» B. optical cable | |
| 799. |
The presence of pit on CD indicates |
| A. | 0 |
| B. | 2 |
| C. | 4 |
| D. | 1 |
| Answer» E. | |
| 800. |
The electric current flowing through an electromagnetic in the receiver produces a varying |
| A. | potential field |
| B. | magnetic field |
| C. | shock field |
| D. | none of above |
| Answer» C. shock field | |