What happens to the atomic number of an element which emits an alpha particle.
What happens to the atomic number of an element which emits an alpha particle:
Decrease by 2 | |
Stays the same | |
Increase by 1 | |
Decrease by 1 |
Physics MCQS
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The speed of sound in air is.
The speed of sound in air is:
1264 kmh-1 | |
1246 kmh-1 | |
1462 kmh-1 | |
21462 kmh-1 |
When we heat the metal at high temperature they emit.
When we heat the metal at high temperature they emit:
Protons | |
Holes | |
Neutrons | |
Electrons |
If the current in a wire which is placed perpendicular to a magnetic field increases, the force on the wire.
If the current in a wire which is placed perpendicular to a magnetic field increases, the force on the wire:
Remain same | |
Will be zero | |
Decreases | |
Increases |
What is power rating of a lamp connected to a12 V source when it carries a current of 2.5 A.
What is power rating of a lamp connected to a12 V source when it carries a current of 2.5 A:
30 w | |
60 w | |
4.8 w | |
14.5 w |
The refractive index of diamond is.
The refractive index of diamond is:
2.42 | |
1.52 | |
2.21 | |
1.66 |
The unit of electric intensity is.
The unit of electric intensity is:
ms-1 | |
Ns | |
NC-1 | |
Nm |
An object is 14 cm in front of a concave mirror.The image is 5.8 cm behind the mirror. What is the focal length of the mirror.
An object is 14 cm in front of a concave mirror.The image is 5.8 cm behind the mirror. What is the focal length of the mirror:
9.9 cm | |
20 cm | |
4.1 cm | |
8.2 cm |
For a normal person, audible frequency range for sound wave lies between.
For a normal person, audible frequency range for sound wave lies between:
30 Hz - 30 kHz | |
10 Hz - 10 kHz | |
25 Hz - 25 kHz | |
20 Hz - 20 kHz |
A large ripple tank with a vibrator working at a frequency of 30 Hz produces 25 complete waves in a distance of 50 cm. The velocity of wave is.
A large ripple tank with a vibrator working at a frequency of 30 Hz produces 25 complete waves in a distance of 50 cm. The velocity of wave is:
1500 cms-1 | |
60 cms-1 | |
53 cms-1 | |
750 cms-1 |
The example of shock absorber of vehicles is.
The example of shock absorber of vehicles is.
Damped motion | |
Simple harmonic motion | |
Vibratory motion | |
Linear motion |
The intensity level of train siren is.
The intensity level of train siren is:
130 dB | |
100 dB | |
120 dB | |
150 dB |
The electric power of washing machine in watt is.
The electric power of washing machine in watt is:
800 | |
100 | |
750 | |
50 |
In simple pendulum, motion restoring force is provided by.
In simple pendulum, motion restoring force is provided by:
Weight of body | |
Tension in string | |
Air resistance | |
Inertia |
What does the term e-mail stand for.
What does the term e-mail stand for:
Electronic mail | |
Extra mail | |
Emergency mail | |
External mail |
Which thing works on the principle electromagnetic induction in hydroelecto power house.
Which thing works on the principle electromagnetic induction in hydroelecto power house:
Generator | |
Voltaic cell | |
Motor | |
Galvanic cell |
Give the number of factors which affect the Ability of a capacitor to store charge.
Give the number of factors which affect the Ability of a capacitor to store charge:
2 | |
5 | |
4 | |
3 |
The refractive index of diamond is.
The refractive index of diamond is:
1.52 | |
2.42 | |
2.21 | |
1.66 |
Waves transfer.
Waves transfer:
Wavelength | |
Energy | |
Frequency | |
Velocity |
The output of OR gate will be 0 when.
The output of OR gate will be 0 when:
A = 1 , B = 1 | |
A = 0 , B = 1 | |
A = 1 , B = 0 | |
A = 0 , B = 0 |