The electric field strength at a point is defined as

the force per unit charge on a positive test charge

An electric current is induced in a coil when

the magnetic field through it is changing

12questions. Pick an answer and you'll see why right away.

A neutral object becomes negatively charged when it
If the distance between two point charges is halved, the electrostatic force between them becomes
The electric field strength at a point is defined as
Two parallel plates $0.020$ m apart have a potential difference of $40.$ V. What is the field strength between them?
A potential difference of $18$ V is applied across a $6.0$ ohm resistor. What is the current?
A resistor carries $3.0$ A and has a resistance of $4.0$ ohms. What power does it dissipate?
In a series circuit, which quantity is the same through every component?
Two $8.0$ ohm resistors are connected in parallel. What is the equivalent resistance?
Adding a resistor in parallel to a circuit causes the total resistance to
A charged particle moves parallel to a uniform magnetic field. The magnetic force on it is
A $2.0$ C charge moves at $4.0$ m/s perpendicular to a $0.50$ T magnetic field. What is the magnetic force on it?
An electric current is induced in a coil when