Ohms Law Worksheet grade 9 science PDF

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Ohms Law Worksheet grade 9 science practise material to help improve in grade 9 science class academic...

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Name: Surname: Ohm’s Law (Worksheet) Q.1. Fill in the blanks with suitable words. a) CURRENT (I) is a measure of the rate of flow of electric charge through a circuit. b) VOLT METER are tools used to measure potential difference. c) RESISTANCE (R) is the opposition to the movement of charge through a material. AMMETER are tools used to measure the current in a circuit. d) e) VOLTAGE is the amount of energy per unit charge needed to move that charge between two points in a circuit. Q.2. Write symbol and unit of measure for the following quantities. Quantity Symbol

Unit of Measure

Potential difference

V

Volts(V)

Current

I

Amps (A)

Resistance

R

ohms Ω

Q.3. What is the correct statement of Ohm's Law? For any circuit the electric current is directly proportional to the voltage and is inversely proportional to the resistance. I=V/R

Q.4. Potential difference, current and resistance are related in the following formula; ● To find the potential difference (Voltage): V=I XR Or Voltage = Current x Resistance ● To find the current: I = V/R or Current = voltage / Resistance ● To find the resistance: R= V/I or Resistance = voltage / Current

Q.5. If there are 20 volts across a 4 ohms resistor, what is the current? V= 20Volts R=4ohms I= V/R= 20/4 So, I= 5 Amps a) 10 A c) 20 A

b) 80 A d) 5 A

Q.6. If 10 amperes of electric current flows through a conductor having potential difference between two points is equal to 40 volts, What is the resistance? I=10 AMPS, V=40 volts, R=? R=v/I =40/10= 4ohms

Name: Surname: a) 400 Ω c) 4 Ω

b) 10 Ω d) 40 Ω

Q.7. If a current of 3 amperes flows through a resistance of 15 ohms, what is the potential difference? I=3Amps, R=15 ohms, V=?

V=I X R = 3 X 15 =45Volts

a) 30 V c) 5 V

b) 45 V d) 15 V...