Question
An object can be negatively charged by:
✓
Answer
(a)by giving it extra electrons
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
100 cells each of e.m.f. 5 V and internal resistance 1 ohm are to be arranged so as to produce maximum current in a 25 ohms resistance. Each row is to contain equal number of cells. The number of rows should be(a) 2 (b) 4(c) 5 (d) 10
A power transformer is used to step up an alternating e.m.f. of 220 V to 11 kV to transmit 4.4 kW of power. If the primary coil has 1000 turns, what is the current rating of the secondary ? Assume 100% efficiency for the transformer(a) 4 A(b) 0.4 A(c) 0.04 A (d) 0.2 A
In an alternating current circuit, the phase difference between current I and voltage is $\phi$ then the wattlen component of current will be :
→The figure here gives the electric field of an EM wave at a certain poiunt and a certain instrant. the wave is transporting energy in the negative z direction. what is tha direction of the magnetic field of the wave at that point and instant.
Modern atomic mass scale is based on the mass of:
A nucleus moving with a velocity $\vec{\text{v}}$ emits an $\alpha -$particle. Let the velocities of the $\alpha -$particle and the remaining nucleus be $\vec{\text{v}}_1$ and $\vec{\text{v}}_2$ and their masses be $m_1$ and $m_2.$
→- $\vec{\text{v}},\ \vec{\text{v}}_1$ and $\vec{\text{v}}_2$ must be parallel to each other.
- None of the two of $\vec{\text{v}},\ \vec{\text{v}}_1$ and $\vec{\text{v}}_2$ should be parallel to each other.
- $\vec{\text{v}}_1+\vec{\text{v}}_2$ must be parallel to $\vec{\text{v}}.$
- $\text{m}_1\vec{\text{v}}_1+\text{m}_2\vec{\text{v}}_2$ must be parallel to $\vec{\text{v}}.$
Minimum excitation potential of Bohr's first orbit in hydrogen atom is(a) 13.6 V(b) 3.4 V(c) 10.2 V (d) 3.6 V
A proton and an electron enter a region with equal speed in which a magnetic field is suddenly switched on. The force experienced by them are:
Half life of a radioactive element is 10 days. The time during which quantity remains 1/10 of initial mass will be(a) 100 days(b) 50 days(c) 33 days(d) 16 days
An iron rod of volume $10^{-4} m^3$ and relative permeability $1000$ is placed inside a long solenoid wound with $5\ \text{turns/cm.}$ If a current of $0.5\ A$ is passed through the solenoid, then the magnetic moment of the rod is
→