Grade 12 quiz 2 quarter 2

12 ohm , 3 ohm and 4 ohm are connected in parallel then their equivalent equal ....

• 1.5 ohm

• 3 ohm

• 4 ohm

• 12 ohm

3 ohm, 4 ohm and 12 ohm are connected in series then their equivalent resistance equal ...

• 6 ohm

• 5 ohm

• 12 ohm

• 19 ohm

when the length of a wire decreased to its half value and its area not changed then its resistance ......

• not changed

• decreased to its half value

• increased to double its value

• no correct answer

the factors acting on the conductivity of a conductor are ...

• length and area

• temperature and length

• kind of material and temperature

• kind of material and area

when current of intensity 2 A passing in a conductor of resistance 10 ohms then the potential difference between the terminals of the resistance is ...

• 20 V

• 8 V

• 5 V

• 12 V

In the opposite figure if the current passing through the source is 1 A, then the value of (R) is ....

• 3 ohm

• 6 ohm

• 9 ohm

• 12 ohm

when the area of the conductor increased to its double then its resistivity ...

• increased to double

• decreased to half

• remains constant

• increased 4 times its value

Two copper wires of same area, if the length of the first double that of the second then the ratio between resistance of the first to resistance of the second is ...

• 1:4

• 4:1

• 1:2

• 2:1

the unit of resistance is

• volt

• ampere

• volt / ampere

• Ampere / volt

coulomb / sec is equivalent to ....

• volt

• ohm

• Ampere

• coulomb