Question 5 :
The insulator of electricity is which of the following materials listed below:
Question 7 :
Current in a circuit flows in which of the following directions listed below:
Question 8 :
Calculate the total number of electrons flowing through a circuit in {tex} 20 \mathrm{mins} {/tex} and {tex} 40 \mathrm{~s} {/tex} if a current of 40{tex}\mu A{/tex} flows through the circuit.<br />({tex} 1 \mathrm{e}^{-}=1.6 \times 10^{-19} \mathrm{C}{/tex})
Question 11 :
The acceleration produced in a body by a force of given magnitude depends on the following factor:
Question 13 :
A man is walking from east to west on a rough surface. The force on the man is directed :
Question 14 :
The mass of earth is {tex} 6 \times 10^{24} \mathrm{~kg} {/tex} and radius of earth is {tex} 6.4 \times 10^{6} \mathrm{~m} . {/tex} The magnitude of force between the mass of {tex} 1 \mathrm{~kg} {/tex} and the earth is :
Question 15 :
A tennis ball and cricket ball are both stationary. To get them into the state of motion, the following action is required:
Question 17 :
Inertia is the property of a body by virtue of which the body is :
Question 18 :
Calculate the gravitational force of attraction between the two bodies of mass {tex} 50 \mathrm { kg } {/tex} and mass {tex} 90 \mathrm { kg } {/tex} separated by a distance {tex} 15 \mathrm { m } {/tex}. Take {tex} \mathrm { G } = 6.7 \times 10 ^ { - 11 } \mathrm { Nm } ^ { 2 } / \mathrm { kg } ^ { 2 } {/tex}
Question 19 :
The force of attraction between two masses each of 1 kg kept at a separation of 1 m is which one of the values shown below:
Question 20 :
The linear momentum of a body of mass m moving with velocity v is:
Question 21 :
A part of the longitudinal wave in which particles of the medium are closer than the normal particles is called :
Question 22 :
A part of longitudinal wave in which particles of the medium are farther away than the normal particles is called :
Question 24 :
If the speed of {tex} \operatorname { cog } {/tex} wheel is halved , bass note is produced
Question 25 :
In case of longitudinal waves, the particles of the medium vibrate :
Question 29 :
The number of oscillations passing through a point in unit time is called :
Question 34 :
If the frequency of a wave is 25 Hz. the total number of compressions and rarefactions passing through a point in 1 second is :
Question 36 :
In the region of compression or rarefaction, in a longitudinal wave, the physical quantity which does not change is :
Question 40 :
A bat emits an ultrasonic sound of frequency 0.25 MHz. Calculate the time in which one vibration is completed.