Class 10 Electricity CBSE Questions & Answers

Class 10 · Electricity

Class 10 Electricity CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
If a wire of resistivity ‘R’ is stretched to thrice its length, what will be its new resistivity?
  • A
    2R
  • B
    R
    Correct
  • C
    R/2
  • D
    R/9
2
Which of the following material is used for electric wire heater?
  • A
    Silver
  • B
    Copper
  • C
    lead
  • D
    Nichrome
    Correct
3
Ammeter is likely to burn out if you connect it in parallel because.
  • A
    It has high voltage
  • B
    It has low voltage
  • C
    It has low resistance
    Correct
  • D
    It has high resistance
4
Two ebonite rods rubbed on fur repel each other because
  • A
    None of these
  • B
    They both have opposite charges
  • C
    They both have like charges of negative
    Correct
  • D
    They both have like charges of positive
5
A toaster produces more heat than a light bulb when connected in parallel to the 220 V mains. Which of these two has greater resistance?
  • A
    Bulb
    Correct
  • B
    Both have same resistance
  • C
    Toaster
  • D
    None of these.
6
When a constant current is applied for a time of t seconds, How can you increase the heat produced to four times?
  • A
    By decreasing the potential difference to one fourth
  • B
    By decreasing resistance to one fourth
  • C
    By increasing resistance to four times
    Correct
  • D
    By increasing the potential difference to four times
7
A 200W bulb is lighted for two hours. How much energy is consumed?
  • A
    0.8 kwh
  • B
    4 kwh
  • C
    0.4 kwh
    Correct
  • D
    1 kwh
8
The above mentioned symbol is
Question 8 figure 1
  • A
    Rheostat
  • B
    All of these.
  • C
    Variable resistance
    Correct
  • D
    Resistance
9
Statement A : light from bathroom bulb gets dimmer for a moment, when geyser is switched on , Statement B : Insulators conduct charges, they can be charged easily by friction.
  • A
    Both the statement A and B are true
  • B
    statement A is true, B is false
    Correct
  • C
    Neither statement A nor statement B is true.
  • D
    statement B is true, A is false
10
When an electric current is flown through a metallic wire, the particles moving are
  • A
    ions
  • B
    Electron
    Correct
  • C
    atoms
  • D
    Proton
11
Which of the following does not have plus (+) or minus (-) signs marked on it:
  • A
    Voltmeter
  • B
    Battery
  • C
    Ammeter
  • D
    a resistor
    Correct
12
Ayush has connected 3 cells of 2V each to form a battery of 6V. Which arrangement made by him is correct?
  • A
    C is correct Option A
  • B
    D is correct Option B
  • C
    A is correct Option C
    Correct
  • D
    B is correct Option D
13
By considering their position in the periodic table which one of the following elements would you expect to have maximum metallic characteristics?
  • A
    As
  • B
    Be
    Correct
  • C
    Ga
  • D
    Ge
14
What will happen to current passing though a resistor if the potential difference across its ends is doubled and the resistance is halved?
  • A
    Becomes halved
  • B
    Becomes four times
    Correct
  • C
    Becomes one fourth
  • D
    Remain unchanged
15
Three resistors are connected in series with the current in each resistor is 1.5A. The current drawn
  • A
    3A
  • B
    1.0A
  • C
    1.5A
    Correct
  • D
    4.5A