Science 8.pptx Ohms Law with examples and explanation

1. Simple
circuit

2. It contains more than one
piece of electrical apparatus
connected one after
another in a single line
Series
circuit

4. Two or more pieces of
electrical apparatus are
connected side by side so
that current is divided
between them.
Parallel circuit

6. In 1827, GEROG SIMON OHM,
experimentally established the relation
between electric current resistance, and
potential difference in an electric circuit.
OHM’s Law

7. I= V/ R
Where I is the current in amperes (A)
passing through that part of the circuit, V
is the potential difference in volts (V), and R
is the resistance in Ohm’s of the same part
of the circuit
OHM’s Law

8. Calculating Current: If a light bulb has a
resistance of 240 ohms and is connected to a 120-
volt power source, the current flowing through it
can be calculated as:
OHM’s Law

9. Determining Voltage: : For a toaster that draws a
current of 5 amperes and has a resistance of 10
ohms, the voltage across it is:
OHM’s Law

10. 1.Basic Current Calculation
1.A circuit with a 9-volt battery and a resistor of 3 ohms. What is
the current flowing through the circuit?
2. Resistance Determination
Find the resistance of a bulb that draws 0.5 amperes from a
120-volt supply.
3. Voltage Calculation
What is the voltage across a resistor of 15 ohms through which
a current of 2 amperes is flowing?
OHM’s Law practice exercises

11. 1.Basic Current Calculation
1.A circuit with a 9-volt9-volt battery and a resistor of 3 ohms.
What is the current flowing through the circuit?
2. Resistance Determination
Find the resistance of a bulb that draws 0.5 amperes from a
120-volt supply.
3. Voltage Calculation
What is the voltage across a resistor of 15 ohms15 ohms
through which a current of 2 amperes2 amperes is flowing?
OHM’s Law practice exercises