Ratio of disk velocity to hoop velocity ( in case of rotational kinetic energy ) is:
Ratio of disk velocity to hoop velocity ( in case of rotational kinetic energy ) is:
√ 4 /3 | |
2 | |
2-Jan | |
√ 3 / 4 |
Physics MCQS
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Distance between adjacent node and antinode is:
Distance between adjacent node and antinode is:
λ / 2 | |
λ / 4 | |
λ | |
λ / 3 |
If R<sub>x</sub> and R<sub>y</sub> both are negative then resultant lies in the quadrant :
If Rx and Ry both are negative then resultant lies in the quadrant :
1st | |
4th | |
3rd | |
2nd |
In order to double period of a simple pendulum, the length of the pendulum should be increased by :
In order to double period of a simple pendulum, the length of the pendulum should be increased by :
Eight times | |
Three times | |
four times | |
Two times |
The quantivy 1 (km)<sup>2</sup> is equal to:
The quantivy 1 (km)2 is equal to:
1x 105 m2 | |
1x 104 m2 | |
1x 106 m2 | |
1x 107 m2 |
Equation of continuity gives the conservation of the:
Equation of continuity gives the conservation of the:
Energy | |
Speed | |
Mass | |
Volume |
Rocket ejects the burnt gasses at a speed of over ( consuming fuel at rate of 10000 kg / s):
Rocket ejects the burnt gasses at a speed of over ( consuming fuel at rate of 10000 kg / s):
400 cm/s | |
4000 cm/s | |
400 m/s | |
4000 m/s |
In a pure inductive A.C circuit, the current:
In a pure inductive A.C circuit, the current:
Lags behind voltage by 90o | |
Leads the voltage by 270o | |
In phase with voltage | |
Leads the voltage by 90o |
Einstein was awarded Nobel Prize in Physics in:
Einstein was awarded Nobel Prize in Physics in:
1921 | |
1905 | |
1918 | |
1911 |
The Value of coulomb's constant (K) in SI Units is:
The Value of coulomb's constant (K) in SI Units is:
9 x 109 Nm2C-2 | |
9 x 109 NC2m-2 | |
9 x 109 Nm2C2 | |
9 x 109 N-1m2C2 |
Filament in CRO:
Filament in CRO:
Controls the number of electrons | |
Has negative Potential | |
Emits Electrons | |
Controls the brightness of screen |
The peak to peak voltage is:
The peak to peak voltage is:
Vo | |
-Vo | |
2Vo | |
√2Vo |
At k = 0 semi conductors are:
At k = 0 semi conductors are:
Insulators | |
Conductors | |
Perfect conductors | |
Perfect insulators |
The numerical value of black colour in carbon resistors is:
The numerical value of black colour in carbon resistors is:
1 | |
3 | |
0 | |
2 |
Radiations emitted by human body at normal temperature 37°C lies in:
Radiations emitted by human body at normal temperature 37°C lies in:
X-ray region | |
Visible region | |
Infrared region | |
Ultraviolet region |
Energy stored per unit volume in magnetic field is called:
Energy stored per unit volume in magnetic field is called:
Work | |
Energy density | |
Power | |
Electric flux |
A 5m wire carrying a current of 2A is at right angle to the uniform magnetic field of 0.5 weber/m<sup>2</sup>. The force on the wire is:
A 5m wire carrying a current of 2A is at right angle to the uniform magnetic field of 0.5 weber/m2. The force on the wire is:
2 N | |
4 N | |
5 N | |
1.5 N |
The reserve process of photoelectric effect is called:
The reserve process of photoelectric effect is called:
Pair production | |
Annihilation of matter | |
X-rays | |
Compton effect |
If an electron of charge 'e' is accelerated through a potential difference V, it will acquire energy:
If an electron of charge 'e' is accelerated through a potential difference V, it will acquire energy:
V/2 | |
Ve | |
Ve2 | |
E/V |
The amount of energy required to break the nucleus is called its:
The amount of energy required to break the nucleus is called its:
Kinetic energy | |
Nuclear energy | |
Binding energy | |
Potential energy |