MCQ
Magnetic lines of force can pass through:
- AOnly magnetic substances.
- BOnly non-magnetic substances.
- CBoth (a) and (b).
- DNone of the above.
✓
Answer
- Both (a) and (b).
Explanation:
Magnetic field can penetrate through both magnetic and non-magnetic substances.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
If there is no external force acting on a nonrigid body, which of the following quantities must remain constant?
- Angular momentum.
- Linear momentum.
- Kinetic energy.
- Moment of inertia.
The shape of the wavefront of the portion of the wavefront of light from a distant star intercepted by the earth is
If the voltage of X-ray tube is doubled, the intensity of X-rays will become
|
(a) Half |
(b) Unchanged |
(c) Double |
(d) Four times |
The arrangement as shown in figure is called as
|
(a) Potential divider |
(b) Potential adder |
(c) Potential substracter |
(d) Potential multiplier |
Which of the following is true?
While using an electric bulb, the reflection for street lighting should be from
|
(a) Concave mirror |
(b) Convex mirror |
(d) Parabolic mirror |
(d) Parabolic mirror |
Referring to the figure below, the effective resistance of the network is
|
(a) 2 r |
(b) 4 r |
(c) 10 r |
(d) 5r/2 |
If work function of metal is 3eV then threshold wavelength will be
|
(a) 4125 Å |
(b) 4000 Å |
(c) 4500 Å |
(d) 5000 Å |
Which of the following curves may represent the speed of the electron in a hydrogen atom as a function of the principal quantum number n?
An electron moves along the line AB, which lies in the same plane as a circular loop of conducting wires as shown in the diagram. What will be the direction of current induced if any, in the loop
| (a) No current will be induced |
|
(b) The current will be clockwise |
|
(c) The current will be anticlockwise |
|
(d) The current will change direction as the electron passes by |