A current loop placed in a magnetic field behaves like a
|
(a) Magnetic dipole |
(b) Magnetic substance |
(c) Magnetic pole |
(d) All are true |
A current loop placed in a magnetic field behaves like a
|
(a) Magnetic dipole |
(b) Magnetic substance |
(c) Magnetic pole |
(d) All are true |
(a) Magnetic dipole
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In nuclear reaction
A denotes
|
(a) Electron |
(b) Positron |
(c) Proton |
(d) Neutron |
Infrared radiation was discovered in 1800 by
|
(a) William Wollaston |
(b) William Herschel |
(c) Wilhelm Roentgen |
(d) Thomas Young |
In the given network capacitance, and
. What is the resultant capacitance between A and B
|
(a) 2.2 μF |
(b) 3.2 μF |
(c) 1.2 μF |
(d) 4.7 μF |
4 bulbs marked 40 W, 250 V are connected in series with 250 V mains. The total power is
|
(a) 10 W |
(b) 40 W |
(c) 320 W |
(d) 160 W |
Given below are symbols for some logic gates
The XOR gate and NOR gate respectively are
|
(a) 1 and 2 |
(b) 2 and 3 |
(c) 3 and 4 |
(d) 1 and 4 |
3 identical bulbs are connected in series and these together dissipate a power P. If now the bulbs are connected in parallel, then the power dissipated will be
|
(a) |
(b) 3P |
(c) 9P |
(d) |
Consider the points lying on a straight line joining two fixed opposite charges. Between the charges there is
|
(a) No point where electric field is zero |
|
(b) Only one point where potential is zero |
|
(c) Only one point where electric field is zero |
|
(d) a, b |
Light wave is travelling along y-direction. If the corresponding vector at any time is along the x-axis, the direction of
vector at that time is along
|
(a) y-axis |
(b) x-axis |
(c) + z-axis |
(d) – z axis |