MCQS of Physics for NTS
Two electric bulbs of 200 W and 100 W have same voltage.If R1 and R2 be their resistance respectively then
R1 = 4R
R2 = 2R
R2 = 4R
R1 = 2R2
The nucleus 6C12 absorbs an energetic neutron and emits a beta particle (?) The resulting nucleus is
5
6
7
7N14
What remains constant when the earth revolves around the sun?
Angular kinetic energy
Linear kinetic energy
Angular momentum
Linear momentum
The fundamental unit which has same power in the dimensional formula of surface tension and viscosity is:
None
Mass
Length
Time
The frequency of the incident light falling on a photosensitive metal plate is doubled the kinetic energy of the emitted photoelectrons is
More than doubled
Less than doubled
Double the earlier value
Unchanged
The modulus of rigidity of a liquid is
Infinity
Zero
A value not one of those mentioned above
1
A photoelectric cell converts
Light energy to elastic energy
Light energy to light energy
Light energy to electrical energy
Electrical energy to light energy
A ten-ohm electric heater operates on a 110 V line Calculate the rate at which it develops heat in watts:
810 W
670 W
1210 W
1310 W
The percentage errors in the measurements of mass and speed are 2% and 3% respectively. How much estimate of the kinetic energy obtained by measuring mass and speed
1%
5%
8%
11%
Electrons in the atom are held in the atom due to
Nuclear forces
Van der Waal’s forces
Gravitational forces
Coulomb forces
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