Electrician sem1 mod5 Mag & Cap

Calculate the total capacitance value in the circuit.

• 0.16 µF

• 6 µF

• 30 µF

• 70 µF

What is the unit of capacitance?

• Mho

• Henry

• Farad

• Coulomb

What is the capacitance value of a capacitor that requires 0.5 coulomb to charge to 35 volt?

• 0.014 F

• 0.025 F

• 0.14 F

• 0.25 F

How the value of capacitance can be decreased?

• Increasing the plate area

• Increasing the resistance of the plates

• Increasing the distance between the plates

• Using high dielectric constant material

Which is the diamagnetic substance?

• Air

• Steel

• Water

• Platinum

Which factor affects the polarity of the electromagnet?

• Length of the coil

• Direction of current

• Strength of current

• Strength of the magnetic field

What is the unit of Magneto Motive Force (MMF)?

• Ampere / m²

• Ampere - m

• Ampere - turns

• Ampere / turns

What is the total inductance if 3 inductors (L1, L2 and L3) are connected in series?

• LT = L1 x L2 x L3

• LT = L1 + L2 + L3

What is the unit of permeance?

• Ampere - turns

• Weber/Ampere turns

• Ampere turns/Weber

• Weber/Square metre

Which rule is applied to find the direction of magnetic fields in a solenoid coil?

• Cork screw rule

• Right hand palm rule

• Flemings left hand rule

• Flemings right hand rule