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Science
10th
grade
Resistance : Factors and Cases | Electricity | Assessment | English | Grade 10
6 questions
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- 1. Multiple Choice
Resistivity depends upon _______ of the wire and it's SI unit is _____ .
material of the wire; Ωm
length of the wire; Ω
material of the wire; Ω
cross sectional area and length of the wire; Ωm
- 2. Multiple Choice
Choose the correct statement: Assertion (A): Current is decreased when length of the wire is increased. Reason (R): Resistance in a circuit is directly proportional to the length of the wire.
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not the correct explanation of A
A is true but R is false
Both A and R are false
- 3. Multiple Choice
What will happen to the resistance if the radius of the wire is made twice and length becomes half?
Resistance will become 4 times
Resistance will become 8 times
Resistance will become half
Resistance will become 1/8 times
- 4. Multiple Choice
The MCBs are connected in series with the whole power supply coming to your house because _______ .
MCBs has copper wire inside them
MCBs enhance voltage supply
all the current flows through the MCB. In case of short circuit it stops the supply there only
the circuit is sensitive to the electric current. It get discharged when more than the rated current flows through it.
- 5. Multiple Choice
Choose the odd one out
1/R = 1/R₁ + 1/R₂ + 1/R₃
V is constant
I = I₁ + I₂ + I₃
V = V₁ + V₂ + V₃
- 6. Multiple Choice
Calculate the current in the circuit.
6 A
1.5 A
1 A
4.5 A
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