120 + Mcqs in AIIMS 2014 Page 3 McqOptions

101.	Assertion Static crashes are heard on radio, when lightning flash occurs in the sky. Reason Electromagnetic waves having frequency of radiowave range, interfere with radiowaves.
A.	If both the assertion and reason are true and reason explains the assertion.
B.	If both the assertion and reason are true but reason does not explain the assertion.
C.	If assertion is true but reason false
D.	If assertion is false but reason is true
Answer» B. If both the assertion and reason are true but reason does not explain the assertion.

Discussion

102.	Assertion If the ice on the polar caps of the earth melts, then length of day will increase. Reason Moment of inertia of the earth increases, as ice on polar caps melts.
A.	If both the assertion and reason are true and reason explains the assertion.
B.	If both the assertion and reason are true but reason does not explain the assertion.
C.	If assertion is true but reason false
D.	If assertion is false but reason is true
Answer» B. If both the assertion and reason are true but reason does not explain the assertion.

Discussion

103.	Assertion In photoelectron emission the velocity of electron ejected from near the surface is larger than that coming from interior of metal. Reason The velocity of ejected electron will be zero.
A.	If both the assertion and reason are true and reason explains the assertion.
B.	If both the assertion and reason are true but reason does not explain the assertion.
C.	If assertion is true but reason false
D.	If assertion is false but reason is true
Answer» E.

Discussion

104.	Assertion In a stationary wave, there is not transfer of energy. Reason There is no outward motion of the disturbance from one particle to adjoining particle in a stationary wave.
A.	If both the assertion and reason are true and reason explains the assertion.
B.	If both the assertion and reason are true but reason does not explain the assertion.
C.	If assertion is true but reason false
D.	If assertion is false but reason is true
Answer» E.

Discussion

105.	Assertion The ratio of inertial mass to gravitational mass is equal to one. Reason The inertial mass and gravitational mass of a body are equivalent.
A.	If both the assertion and reason are true and reason explains the assertion.
B.	If both the assertion and reason are true but reason does not explain the assertion.
C.	If assertion is true but reason false
D.	If assertion is false but reason is true
Answer» D. If assertion is false but reason is true

Discussion

106.	Assertion-A hollow metallic closed container maintie4d at a uniform temperature can act as a source of a black body radiation. Reason-The inertial mass and gravitational mass of a body are equivalent.
A.	If both the assertion and reason are true and reason explains the assertion.
B.	If both the assertion and reason are true but reason does not explain the assertion.
C.	If assertion is true but reason false
D.	If assertion is false but reason is true
Answer» D. If assertion is false but reason is true

Discussion

107.	Three charged particles are collinear and are in equilibrium, then
A.	all the charged particles have the same polarity
B.	the equilibrium is unstable
C.	all the charged particles cannot have the same polarity
D.	Both (b) and (c) are correct
Answer» E.

Discussion

108.	A source of light lies on the angle bisector of two plane mirrors inclined at angle θ. The values of θ, so that the light reflected from one mirror does not reach the other mirror will be
A.	θ ≥ 120°
B.	θ ≥ 90°
C.	θ ≤ 120°
D.	None of the above
Answer» B. θ ≥ 90°

Discussion

109.	If the length and are of cross-section of a conductor are doubled, then tits resistance will be
A.	unchanged
B.	halved
C.	doubled
D.	quadrupled
Answer» B. halved

Discussion

110.	A 50 Hz AC current of crest value 1 A flows through the primary of a transformer. If the mutual inductance between the primary and secondary be 0.5 H, the crest voltage induced in the secondary is
A.	75 V
B.	150 V
C.	100 V
D.	None of these
Answer» D. None of these

Discussion

111.	Silver and copper voltmeters are connected in parallel with a battery of emf 12 V. In 30 min 1 g of silver and 1.8 g of copper are liberated. The energy supplied by the battery is
A.	720 J
B.	2.41 J
C.	24.12 J
D.	4.34 ×104J
Answer» E.

Discussion

112.	A block has been place on an inclined plane with the slope angle θ, block slide down the plane at constant speed. The coefficient of kinetic friction is equal to
A.	sin θ
B.	cos θ
C.	g
D.	tan θ
Answer» E.

Discussion

113.	A particle moves along a curve of unknown shape but magnitude of force F is constant and always acts along tangent to the curve. Then,
A.	F may be conservative
B.	F must be conservative
C.	F may be non-conservative
D.	F must be non-conservative
Answer» E.

Discussion

114.	A weight w is suspended from the mid-point of a rope, whose ends are at the same level. In other to make the rope perfectly horizontal, the force applied to each of its ends must be
A.	less than w
B.	equal to w
C.	equal to 2 w
D.	infinitely large
Answer» E.

Discussion

115.	Four resistance 10 Ω, 5 Ω, 7 Ω and 3 Ω are connected so that they form the side of a rectangle AB, BC, CD and DA respectively. Another resistance of 10 Ω is connected across the diagonal AC. The equivalent resistance between A and B is
A.	2Ω
B.	5Ω
C.	7Ω
D.	10Ω
Answer» C. 7Ω

Discussion

116.	The transfer ratio β of a transistor is 50. The input resistance of the transistor, when used in the common emitter mode is 1 kΩ. The peak value of the collector alternative current for an input peak voltage of 0.01 V is
A.	0.25 μA
B.	0.01 μA
C.	500 μA
D.	100 μA
Answer» D. 100 μA

Discussion

117.	Three particles having charges in the ratio of 2 : 3 : 5 produce the same point on the photographic film in Thomson experiment. Their masses are in the ratio of
A.	2 : 3 : 5
B.	5 : 3 : 2
C.	15 : 10 : 6
D.	3 : 5 : 2
Answer» B. 5 : 3 : 2

Discussion

118.	If there were a reduction in gravitational effect, which of the following forces do you think would change in some respect?
A.	Magnetic force
B.	Electrostatic force
C.	Viscous force
D.	Archimede’s uplift
Answer» E.

Discussion

119.	A ball is dropped from a high rise platform t = 0 starting from rest. Afte4r 6 s another ball is thrown downwards from the same platform with a speed υ. The two balls meet at t = 18 s. What is the value of υ?
A.	74 m/s
B.	64 m/s
C.	84 m/s
D.	94 m/s
Answer» B. 64 m/s

Discussion

120.	A freshly prepared radioactive source of half-life 2 h emits radiation of intensity which is 64 times the permissible safe level. Calculate, the minimum time after which it would be possible to work safely with this source.
A.	12 h
B.	24 h
C.	6 h
D.	130 h
Answer» B. 24 h

Discussion

Explore topic-wise MCQs in AIIMS MBBS.

Assertion Static crashes are heard on radio, when lightning flash occurs in the sky. Reason Electromagnetic waves having frequency of radiowave range, interfere with radiowaves.

Assertion If the ice on the polar caps of the earth melts, then length of day will increase. Reason Moment of inertia of the earth increases, as ice on polar caps melts.

Assertion In photoelectron emission the velocity of electron ejected from near the surface is larger than that coming from interior of metal. Reason The velocity of ejected electron will be zero.

Assertion In a stationary wave, there is not transfer of energy. Reason There is no outward motion of the disturbance from one particle to adjoining particle in a stationary wave.

Assertion The ratio of inertial mass to gravitational mass is equal to one. Reason The inertial mass and gravitational mass of a body are equivalent.

Assertion-A hollow metallic closed container maintie4d at a uniform temperature can act as a source of a black body radiation. Reason-The inertial mass and gravitational mass of a body are equivalent.

Three charged particles are collinear and are in equilibrium, then

A source of light lies on the angle bisector of two plane mirrors inclined at angle θ. The values of θ, so that the light reflected from one mirror does not reach the other mirror will be

If the length and are of cross-section of a conductor are doubled, then tits resistance will be

A 50 Hz AC current of crest value 1 A flows through the primary of a transformer. If the mutual inductance between the primary and secondary be 0.5 H, the crest voltage induced in the secondary is

Silver and copper voltmeters are connected in parallel with a battery of emf 12 V. In 30 min 1 g of silver and 1.8 g of copper are liberated. The energy supplied by the battery is

A block has been place on an inclined plane with the slope angle θ, block slide down the plane at constant speed. The coefficient of kinetic friction is equal to

A particle moves along a curve of unknown shape but magnitude of force F is constant and always acts along tangent to the curve. Then,

A weight w is suspended from the mid-point of a rope, whose ends are at the same level. In other to make the rope perfectly horizontal, the force applied to each of its ends must be

Four resistance 10 Ω, 5 Ω, 7 Ω and 3 Ω are connected so that they form the side of a rectangle AB, BC, CD and DA respectively. Another resistance of 10 Ω is connected across the diagonal AC. The equivalent resistance between A and B is

The transfer ratio β of a transistor is 50. The input resistance of the transistor, when used in the common emitter mode is 1 kΩ. The peak value of the collector alternative current for an input peak voltage of 0.01 V is

Three particles having charges in the ratio of 2 : 3 : 5 produce the same point on the photographic film in Thomson experiment. Their masses are in the ratio of

If there were a reduction in gravitational effect, which of the following forces do you think would change in some respect?

A ball is dropped from a high rise platform t = 0 starting from rest. Afte4r 6 s another ball is thrown downwards from the same platform with a speed υ. The two balls meet at t = 18 s. What is the value of υ?

A freshly prepared radioactive source of half-life 2 h emits radiation of intensity which is 64 times the permissible safe level. Calculate, the minimum time after which it would be possible to work safely with this source.