10(
20(
30(
40(
A particle of mass 100 gm and charge 2 (C is released from a distance of 50 cm from a fixed charge of 5(C. Find the speed of the particle when its distance from the fixed charge becomes 3 m. Neglect any other force.
–1.73 m/s
2.73 m/s
–2.73 m/s
1.73 m/s.
The least count of a stop watch is 1/5 second. The time of 20 oscillations of a pendulum is measured to be 25 seconds. The minimum percentage error in the measurement of time will be
0(1%
8%
1(8%
0(8%
Given that ? is the speed, r is radius and g is acceleration due to gravity. Which of the following is dimensionless?
18%
6%
3%
1%
While measuring acceleration due to gravity by a simple pendulum, a student makes a positive error of 2% in length of the pendulum and a positive error of 1% in the value of time period. The actual percentage error in the measurement of the value of g will be:
3%
4%
5%
zero percent
Maximum and minimum values of the resultant of two forces acting at a point are 7N and 3N respectively. The smaller force will be equal to:
5N
4N
2N
1N
None of these
45º
60º
90º
120º
1
10
A magnetic field:
always exerts a force on charged particle
never exerts a force on charged particle
exerts a force, if the charged particle is moving across the magnetic field lines
exerts a force, if the charged particle is moving along the magnetic field lines
zero
[L3]
[ML3T–2]
[ML5T–2]
[ML2T–2]
A micron in centimeter is equal to:
10–8
10–6
10–5
10–4
The dimensions of the ratio of angular momentum to linear momentum:
[M1L–3T0]
[M0L1T0]
[M0L0T–1]
[M0L1T–2]
Dimensions of impulse are:
[ML–2T–3]
[ML–2]
[MLT–1]
[MLT–2]
By what percentage should the pressure of a given mass of gas be increased, so as to decrease its volume by 10% at a constant temperature?
11.1%
10.1%
9.1%
8.1%