MCQ
A $10\, ohm$ electric heater operates on a $110\, V$ line. Calculate the rate at which it develops heat in ............... $watts$
- A$1310$
- B$670$
- C$810$
- ✓$1210$
✓
Answer
Correct option: D.
$1210$
d
(d) $P = \frac{{{V^2}}}{R} = \frac{{{{(110)}^2}}}{{10}} = \frac{{12100}}{{10}} = 1210\,\,W$
(d) $P = \frac{{{V^2}}}{R} = \frac{{{{(110)}^2}}}{{10}} = \frac{{12100}}{{10}} = 1210\,\,W$
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
The mass of a neutron is:
The characteristic impedance of a coaxial cable is of the order of
In the following four situations charged particles are at equal distance from the origin. Arrange them the magnitude of the net electric field at origin greatest first
In a working nuclear reactor, Cadmium rods, (control rods) are used to
In the circuits shown below, the readings of the voltmeters and the ammeters will be
A cell of emf $6\, V$ and resistance $0.5\, ohm$ is short circuited. The current in the cell is ............... $amp$
→An $X-$ray tube is operated at $1.24$ million volt. The shortest wavelength of the produced photon will be ..... $nm$
→A photon of energy hv is absorbed by o free electron of a metal having work function $\varphi<\text{hv}.$
→A wire of length L and 3 identical cells of negligible internal resistances are connected in series. Due to current, the temperature of the wire is raised by ∆ T in a time t. A number N of similar cells is now connected in series with a wire of the same material and cross – section but of length 2 L. The temperature of the wire is raised by the same amount ∆ T in the same time t. the value of N is
Which of the following processes involves the principle of electrostatic induction?