A charged particle experiences magnetic force in the presence of magnetic field. Which of the following statement is correct ?
The particle is moving and magnetic field is perpendicular to the velocity
The particle is moving and magnetic field is parallel to the velocity
The particle is stationary and magnetic field is perpendicular
The particle is stationary and magnetic field is parallel
If a velocity has both perpendicular and parallel components while moving through a magnetic field, what is the path followed by a charged particle ?
Circular
Elliptical
Linear
Helical
A solenoid has length 0.4 cm, radius 1 cm and 400 turns of wire. If a current of 5 A is passed through this solenoid, what is the magnetic field inside the solenoid ?
6.28 × 10-4 T
6.28 × 10-3 T
6.28 × 10-7 T
6.28 × 10-6 T
A gyromagnetic ratio of the electron revolving in a circular orbit of hydrogen atom is 8.8 × 1010 C kg-1. What is the mass of the electron ? Given, charge of the electron = 1.6 x 10-19 C.
1 x 10-29 kg
0.1 x 10-29 kg
1.1 x 10-29 kg
1/11 x 10-29 kg
What is the value of shunt resistance required to convert a galvanometer of resistance 100 Ω into an ammeter of range 1 A ?
Given, full scale deflection of the galvanometer is 5 mA.
0.5 Ω
0.05 Ω
A circular coil of radius 10 cm and 100 turns carries a current 1 A. What is the magnetic moment of the coil ?
3.142 × 104 Am2
104 Am2
3.142 Am2
3 Am2
C.
3.142 Am2
Given,
Radius of coil, r = 10 × 10-2 m
Number of turns N = 100 turn
Current in the coil i = 1 A
Magnetic moment M = ?
By magnetic dipole moment of current loop
M = NiA, where A = r2
M = Ni. r2 = 100 × 1 × 3.142 × (10 × 10-2)2
= 100 × 3.142 ×100 × 10-4
= 3.142 A-m2
A susceptibility of a certain magnetic material is 400. What is the class of the magnetic material ?
Diamagnetic
Paramagnetic
Ferromagnetic
Ferroelectric
A solenoid of inductance 2 H carries a current 1 A. What is the magnetic energy stored in a solenoid ?
2 J
1 J
4 J
5 J
A multimeter reads a voltage of a certain AC source as 100 V. What is the peak value of voltage of AC source ?
200 V
100 V
141 V
400 V
A senes LCR circuit contains inductance 5 mH, capacitance 2 μF and resistance 10 Ω. If a frequency AC source is varied, what is the frequency at which maximum power is dissipated ?