MCQ
A solenoid is at potential difference 60 V and current flows through it is 15 ampere, then the resistance of coil will be
- ✓4 Ω
- B8 Ω
- C0.25 Ω
- D2 Ω
✓
Answer
Correct option: A.
4 Ω
4 Ω
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
A current $i$ flows in a circular coil of radius $r$. If the coil is placed in a uniform magnetic field $B$ with its plane parallel to the field, magnitude of the torque that acts on the coil is
→A boy stands straight infront of a mirror at a distance of 30 cm away from it. He sees his erect image whose height is $\frac {1}{5}$th of his real height. The mirror he is using is
→In a series circuit $C = 2\mu F,\,L = 1mH$ and $R = 10\,\Omega ,$when the current in the circuit is maximum, at that time the ratio of the energies stored in the capacitor and the inductor will be
→Intensity of sunlight is observed as $0.092\, {Wm}^{-2}$ at a point in free space. What will be the peak value of magnetic field at that point? $\left(\sigma_{0}=8.85 \times 10^{-12}\, {C}^{2} \,{N}^{-1} \,{m}^{-2}\right.$ )
→Radioactive material $'A'$ has decay constant $8 \lambda$ and material $'B'$ has decay constant $ ' \lambda '$. Initially they have same number of nuclei . After what time, the ratio of number of nuclei of material $'B'$ to that $'A'$ will be $\frac{1}{e}$ ?
→The magnetic force between wires as shown in figure is :-
To compare magnetic moments of two magnets by vibration magnetometer, 'sum and difference method' is better because
The magnitude of the electric field due to a point charge at a distance of 4.0 m is 9 N/C. Distance of this point charged substance due to electric field of magnitude 16 N/C will be:
By a cell a current of 0.9 A flows through 2 ohm resistor and 0.3 A through 7 ohm resistor. The internal resistance of the cell is
Three charged particles having charges $q,-2 q$ and $q$ are placed in a line at points $(-a, 0),(0,0)$ and $(a, 0)$ respectively. The expression for electric potential at $P(r, 0)$ for $r \gg a$ is ...............
→