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Physics Questions Answers
Two bodies A and B are of same mass and same amount of heat is given to both of them. If the temperature of A increases more than that of B because of heat addition, then —
the specific heat capacity of A is more than that of B
the specific heat capacity of A is less than that of B
both A and B have the same specific heat capacity but A has greater thermal conductivity
both A and B have the same specific heat capacity but B has greater thermal conductivity
the specific heat capacity of A is less than that of B
A person sitting in an open car moving at constant velocity throws a ball vertically upwards in air. If effect of air resistance is neglected, the ball will fall —
exactly in the hands of the person
outside the car
in the car behind the person
in the car ahead of the person
exactly in the hands of the person
When a thin film of oil is spread over water at rest, coloured bands are observed. This is the result of the phenomenon of —
Dispersion
Interference
Polarisation
Scattering
Interference
Match List I (Type of waves) with List II (Their Application) and select the correct answer using the codes given below the Lists:
List I
(a) Matter Waves
(b) Electromagnetic Waves
(c) Elastic Waves
(d) Longitudinal Waves
List II
1. Surgery using Lasers
2. Acoustic Radar
3. Electron Microscope
4. Musical Instruments
a-3, b-1, c-4, d-2
a-1, b-3, c-4, d-2
a-3, b-1, c-2, d-4
a-1, b-3, c-2, d-4
a-3, b-1, c-2, d-4
Match List I with List II and select the correct answer using the codes given below the Lists:
List I (Discovery)
(a) Radioactivity
(b) Relativity
(c) Gravitation
(d) X-ray
List II (Scientist)
1. Isaac Newton
2. Wilhelm Conrad Roentgen
3. Henri Becquerel
4. Albert Einstein
a-3, b-1, c-2, d-4
a-3, b-4, c-1, d-2
a-1, b-3, c-4, d-2
a-2, b-4, c-1, d-3
a-3, b-4, c-1, d-2
A straight horizontal conductor carries a steady electric current from south to north. Which one of the following events would happen if a small magnetic compass is placed just above the wire?
The needle remains perpendicular to the conductor
The needle remains parallel to the conductor
The north pole of the needle is deflected towards east
The north pole of the needle is deflected towards west
The north pole of the needle is deflected towards east
If a straight current carrying conductor in which electric current flowing from south to north and a compass needle placed below the wire then north-pole of the compass needle deflect towards west. It is because electric current produces magnetic field thus deflecting the needle towards west. And if the current is flowing from north to south in the same adjustment then north-pole of the needle gets deflected towards east.
If the angle between two plane mirrors is 60°, the number of images formed will be
infinite
7
6
5
5
The core of a transformer is laminated, so that
ratio of the voltages across the secondary and primary is doubled
the weight of the transformer can be kept low
the rusting of the core is prevented
energy loss due to eddy current is minimised
energy loss due to eddy current is minimised
Match List I with List II and select the correct answer using the codes given below the Lists:
List I (Theory / Invention)
(a) Exclusion principle
(b) Uncertainty principle
(c) Atomic spectrum of hydrogen atom in visible region
(d) Wave mechanics
List II (Scientist)
1. Balmer
2. Heisenberg
3. Schrödinger
4. Pauli
a-1, b-4, c-2, d-3
a-2, b-4, c-3, d-1
a-4, b-1, c-2, d-3
a-4, b-2, c-1, d-3
a-4, b-2, c-1, d-3
Consider the following statements:
A copper voltameter measures the
1. quantity of current passing through the circuit.
2. amount of copper deposited.
3. resistance of the circuit.
Which of these statements are correct?
1, 2 and 3
1 and 2
2 and 3
1 and 3
1 and 2