MCQOPTIONS
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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.
| 701. |
The sounds which are pleasant to our ears are called |
| A. | noise |
| B. | musical sounds |
| C. | frequency |
| D. | amplitude |
| Answer» C. frequency | |
| 702. |
The characteristic of sound by which we can distinguish between a shrill and a grave sound is known as |
| A. | quality |
| B. | intensity |
| C. | loudness |
| D. | pitch |
| Answer» E. | |
| 703. |
To prevent lightning from damaging tall buildings, we use |
| A. | lightning conductors |
| B. | lightning capacitors |
| C. | lightning insulators |
| D. | lightning gases |
| Answer» B. lightning capacitors | |
| 704. |
To protect the leaves from the external electrical disturbance, we use |
| A. | chords |
| B. | capacitors |
| C. | mercury foil |
| D. | aluminum foil |
| Answer» E. | |
| 705. |
The unit for electric field intensity is |
| A. | N |
| B. | NC-1 |
| C. | Ns |
| D. | n |
| Answer» C. Ns | |
| 706. |
Electric potential is a |
| A. | unmeasurable quantity |
| B. | vector quantity |
| C. | scalar quantity |
| D. | none of above |
| Answer» D. none of above | |
| 707. |
If W is the work done in moving a positive charge q from infinity to a certain point in the field, the electric potential V at this point would be equal to |
| A. | V = W/q |
| B. | V = q/W |
| C. | V = W×q |
| D. | V = W + q |
| Answer» B. V = q/W | |
| 708. |
If a light bulb is switched on for 20 s and it consumes 2400 J of electrical energy then it's power is |
| A. | 60 W |
| B. | 70 W |
| C. | 80 W |
| D. | 90 W |
| Answer» B. 70 W | |
| 709. |
The resistance of a wire depends upon |
| A. | cross sectional area |
| B. | length of the wire |
| C. | wire material's nature |
| D. | all of above |
| Answer» E. | |
| 710. |
Diamond does not conduct electricity because it has |
| A. | no free electrons |
| B. | free electrons |
| C. | no free protons |
| D. | free neutrons |
| Answer» B. free electrons | |
| 711. |
In parallel combination the voltage passing through each resistor is |
| A. | same |
| B. | different |
| C. | low voltage |
| D. | high voltage |
| Answer» B. different | |
| 712. |
One kilowatt-hour is equal to |
| A. | 36×105 J |
| B. | 32×105 J |
| C. | 30×105 J |
| D. | 35×105 J |
| Answer» B. 32×105 J | |
| 713. |
On the internet, the function which allows users to view web pages is known as |
| A. | web browsing |
| B. | |
| C. | post |
| D. | e-commerce |
| Answer» B. e-mail | |
| 714. |
It processes the input signal |
| A. | transmitter |
| B. | transmission channel |
| C. | receiver |
| D. | hardware |
| Answer» B. transmission channel | |
| 715. |
A multi-mode cable is about |
| A. | 5 times of single-mode cable |
| B. | 4 times of single-mode cable |
| C. | 8 times of single-mode cable |
| D. | 10 times of single-mode cable |
| Answer» E. | |
| 716. |
When we speak into the mouthpiece, the sound vibrations also vibrate the |
| A. | diaphragms |
| B. | mentacles |
| C. | cylinder braid |
| D. | insulating sleeve |
| Answer» B. mentacles | |
| 717. |
The way of doing business on the web is known as |
| A. | web browsing |
| B. | |
| C. | post |
| D. | e-commerce |
| Answer» E. | |
| 718. |
In the air, the beta particle has a range of |
| A. | few centimeters |
| B. | several thousand meters |
| C. | several hundred meters |
| D. | several meters |
| Answer» E. | |
| 719. |
The radiations emitted by different elements are |
| A. | alpha |
| B. | beta |
| C. | gamma |
| D. | all of above |
| Answer» E. | |
| 720. |
Radiation that causes redness and sores on the skin is |
| A. | gamma only |
| B. | beta only |
| C. | alpha |
| D. | gamma and beta |
| Answer» E. | |
| 721. |
In the atmosphere, a small amount is present of radioactive |
| A. | carbon-15 |
| B. | carbon-19 |
| C. | carbon-10 |
| D. | carbon-14 |
| Answer» E. | |
| 722. |
The mass of neutron and proton is |
| A. | equal |
| B. | unequal |
| C. | zero |
| D. | undetermined |
| Answer» B. unequal | |
| 723. |
The line passing through the two centers of curvatures of the lens is called |
| A. | principal axis |
| B. | optical center |
| C. | principal focus |
| D. | focal length |
| Answer» B. optical center | |
| 724. |
Reflection by smooth surfaces is called |
| A. | irregular reflection |
| B. | refraction |
| C. | regular reflection |
| D. | reflection |
| Answer» D. reflection | |
| 725. |
The lens which diverges light from a single point is |
| A. | concave lens |
| B. | convex lens |
| C. | biconvex lens |
| D. | all of above |
| Answer» B. convex lens | |
| 726. |
The speed of light in air is approximately |
| A. | 3.0 × 108 m s-1 |
| B. | 4.0 × 108 m s-1 |
| C. | 3.0 × 105 m s-1 |
| D. | 5.0 × 108 m s-1 |
| Answer» B. 4.0 × 108 m s-1 | |
| 727. |
The focus is in front of the mirror in |
| A. | plane mirror |
| B. | convex mirror |
| C. | concave mirror |
| D. | silver mirror |
| Answer» D. silver mirror | |
| 728. |
By applying a potential difference of 7 V across a conductor, a current of 2 A passes through it. The energy obtained in 2.5 minutes is |
| A. | 2000 J |
| B. | 2500 J |
| C. | 2100 J |
| D. | 1800 J |
| Answer» D. 1800 J | |
| 729. |
The rate of energy transferred if a current of 0.5 A passes through a bulb connected across a battery of 6 V for 20 s is |
| A. | 80 J |
| B. | 20 J |
| C. | 30 J |
| D. | 60 J |
| Answer» E. | |
| 730. |
SI unit for electromotive force is |
| A. | J-1 |
| B. | C-1 |
| C. | JC-1 |
| D. | km-1 |
| Answer» D. km-1 | |
| 731. |
The potential difference across a circuit component can be measured by a |
| A. | Vernier calipers |
| B. | galvanometer |
| C. | ammeter |
| D. | voltmeter |
| Answer» E. | |
| 732. |
The positive and negative terminals of direct current have |
| A. | no polarity |
| B. | fixed polarity |
| C. | variable polarity |
| D. | always negative polarity |
| Answer» C. variable polarity | |
| 733. |
The ciliary muscles of the eye control the |
| A. | lens movement |
| B. | lens curvature and focal length |
| C. | pupil |
| D. | retina |
| Answer» C. pupil | |
| 734. |
For a concave mirror, the focus is |
| A. | real |
| B. | virtual |
| C. | erect |
| D. | bent |
| Answer» B. virtual | |
| 735. |
The convex lens becomes a magnifying glass when |
| A. | object is placed inside lens's focal length |
| B. | object is placed at focal length |
| C. | object is placed behind focal length |
| D. | object is placed inverted in front of the lens |
| Answer» B. object is placed at focal length | |
| 736. |
The types of spherical mirrors are |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |
| 737. |
When dealing with diverging lenses, with focal length and image position we use |
| A. | zero |
| B. | square |
| C. | positive sign |
| D. | negative sign |
| Answer» E. | |
| 738. |
The SI unit of power of a lens is |
| A. | Pascal |
| B. | omega |
| C. | Newton |
| D. | diopter |
| Answer» E. | |
| 739. |
In 1900, Planck suggested that light consists of small packets of energy that are called |
| A. | neutron |
| B. | photon |
| C. | electron |
| D. | radii |
| Answer» C. electron | |
| 740. |
As compared to the single lens, a compound microscope gives |
| A. | smaller magnification |
| B. | greater magnification |
| C. | no magnification |
| D. | equal magnification |
| Answer» C. no magnification | |
| 741. |
If ‘p’ is object distance ‘q’ is image distance from the mirror and ‘f’ is the focal length of the mirror then 1/f is equal to |
| A. | 1/p - 1/q |
| B. | 1/q - 1/p |
| C. | 1/p + 1/q |
| D. | 1/p × 1/q |
| Answer» D. 1/p × 1/q | |
| 742. |
The focus of the concave mirror is |
| A. | zero |
| B. | negative |
| C. | virtual |
| D. | real |
| Answer» E. | |
| 743. |
Significant magnetic fields can be produced in |
| A. | heart only |
| B. | brain only |
| C. | lungs |
| D. | heart and brain |
| Answer» E. | |
| 744. |
The metal detectors installed at airports and other places for security purpose are based on the principle of |
| A. | potential difference |
| B. | electromagnetic difference |
| C. | electromagnetic induction |
| D. | potential energy |
| Answer» D. potential energy | |
| 745. |
Magnetic effect of current is called |
| A. | magnetism |
| B. | atomic energy |
| C. | electromagnet |
| D. | potential difference |
| Answer» D. potential difference | |
| 746. |
The mechanical energy of our hand used to push the magnet towards or away from the coil results into |
| A. | potential energy |
| B. | heat energy |
| C. | kinetic energy |
| D. | electrical energy |
| Answer» E. | |
| 747. |
An ideal transformer dissipates |
| A. | unit power |
| B. | infinite power |
| C. | zero power |
| D. | limited power |
| Answer» D. limited power | |
| 748. |
Waves which require any medium for their propagation are called |
| A. | mechanical waves |
| B. | electromagnetic waves |
| C. | transverse waves |
| D. | longitudinal waves |
| Answer» B. electromagnetic waves | |
| 749. |
Shock absorbers in automobiles are one particle application of |
| A. | linear motion |
| B. | simple harmonic motion |
| C. | damped motion |
| D. | random motion |
| Answer» D. random motion | |
| 750. |
When a wave from one medium enters into the second medium at some angle, its direction of travel changes. This phenomenon is known as |
| A. | refraction of waves |
| B. | diffraction of waves |
| C. | reflection of waves |
| D. | deflection of waves |
| Answer» B. diffraction of waves | |