I need important MCQs from the chapter electricity
class 10th
(most expected questions)
atleast 15 or 20
make it fast
worng answers will be reported
Answers
Answer:
refer to the attachment please
Explanation
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's metabolic activities. This chemical energy is stored in carbohydrate molecules, such as sugars and starches, which are synthesized from carbon dioxide and water – hence the name photosynthesis, from the Greek phōs, "light", and sunthesis, "putting together" In most cases, oxygen is also released as a waste product. Most plants, algae, and cyanobacteria perform photosynthesis; such organisms are called photoautotrophs. Photosynthesis is largely responsible for producing and maintaining the oxygen content of the Earth's atmosphere, and supplies most of the energy necessary for life on Earth.
Answer:
1. What is the amount of current flowing through an electric press, if the amount of charge passing through a conductor in 10 minutes is 300 C?
(a) 30 A
(b) 0.3 A
(c) 0.5 A
(d) 5 A
Answer: (c) 0.5 A
2. An electrical appliance has a resistance of 25 Ω. When this electrical appliance is connected to a 230 V supply line, the current passing through it will be:
(a) 0.92 A
(b) 2.9 A
(c) 9.2 A
(d) 92 A
Answer: (c) 9.2 A
3. When a 4 Ω resistor is connected across the terminals of a 2 V battery, the number of coulombs passing through the resistor per second is:
(a) 0.5
(b) 1
(c) 2
(d) 4
Answer: (a) 0.5
4. Keeping the potential difference constant, the resistance of the circuit is halved. The current will become:
(a) One-fourth
(b) Four times
(c) Half
(d) Double
Answer: (d) Double
5. If in the given arrangement, the three resistors are to be replaced by a single resistor. What will be the value of this resistor?

(a) 4Ω
(b) 6Ω
(c) 9Ω
(d) 18Ω
Answer: (c) 9Ω
6. The potential difference across the 3 Ω resistor in the following diagram is:
(a) 1/9 V
(b) 1/2 V
(c) 2V
(d) 1V
Answer: (d) 1V
7. V1, V2 and V3 are the potential differences across the 1Ω, 2Ω and 3Ω resistors in the following diagram, and the current is 5A.

Which of the following shows the correct values of V1, V2 and V3 measured in volts?
(a) V1 =1, V2 = 2 and V3 = 3
(b) V1 =5, V2 = 10 and V3 = 15
(c) V1 =5, V2 = 2.5 and V3 = 1.6
(d) V1 =4, V2 = 3 and V3 = 2
Answer: (b) V1 =5, V2 = 10 and V3 = 15
8. A wire of resistance R1 is cut into five equal pieces. These five pieces of wire are then connected in parallel. If the resultant resistance of this combination be R2, then the ratio R1/ R2 is:
Answer: (d) 25
9. Two appliances of rating 200 watt-250 volts and 100 watt-250 volts are joined in series to a 250 volts supply. Total power consumed in the circuit is
(a) 46 watt
(b) 67 watt
(c) 10 watt
(d) 30 watt
Answer: (b) 67 watt
10. When a current 'I' flows through a resistance 'R' for time 't' the electrical energy spent is given by
(a) IRt
(b) I2Rt
(c) IR2t
(d) I2R/t
Answer: (b) I2Rt
11. Two electric bulbs have resistances in the ratio 1:2. If they are joined in series, the energy consumed in them is in the ratio.
(a) 2:1
(b) 1:2
(c) 4:1
(d) 1:1
Answer: (b) 1:2
12. At a given time, a house is supplied with 100 A at 220 V. How many 75 W, 220 V light bulbs could be switched on in the house at the same time (if they are all connected in parallel)?
(a) 93
(b) 193
(c) 293
(d) 393
Answer: (c) 293