Test Your Understanding Of Electrical Quantities With This Quiz

Balloon x repels means has same charge as the negative one. y attract so opposite charge to negative balloon

The whole of rod P is negative (not just one side) so its always going to be repelled by nagative Q

Resistance should be the same for any of them, so use V=IR to find the resistance for each row, A,C,D all get a resistance of 2.4 ohms. B is different

When rubbed together one object will GAIN electrons (negative) and the other LOSE electrons (positive) opposite charges, and they would attract

Longer length = higher resistance thinner wire = larger resistance

need to increase length AND make it thinner (if make shorter but thinner these have opposite effects as shorter reduces resistance)

Bright light - lowest resistance possible, short and large thickness. Dimmest is opposite

Only ever should be electrons moving, if rod is negative it means the cloth must be positive

Voltmeter reads voltages, emf and pd are voltages

not-available-via-ai

emf is a voltage

Largest current will come from wire of lowest resistance, so short length and thick

not-available-via-ai

Static needs INSULATORS, glass and plastic are only options (electrostatic = static)

Meter x must be current as in series, Y voltage as around the resistor.
Normally voltages are larger than currents so thats why C is not right (also can use V=IR to check)