Midterm Test Physics Grade 10-12

Look at the picture provided, state the connection type and do calculation for the total resistor.

What type of connection and Calculate the total resistor in this circuit.

From this Picture please find the total current in this circuit using Ohm's law formula

Find the current from this circuit.

Find the current in intersection circuit A and B.

A washing machine operates at 800 W and is used for 1 hour per day. Calculate the total energy used in 15 days, and how much would the electricity cost if the rate is Rp 1,400 per kWh?

·        4 lamps (each 20W, used 5 hours/day)

·        1 fan (75W, used 10 hours/day)

·        1 rice cooker (300W, used 2 hours/day)

If the electricity rate is Rp 1,400 per kWh, how much would the electricity bill be in 30 days?

What was the primary observation from Rutherford's gold foil experiment that led to a new atomic model?

• Alpha particles passed through the foil with no deflection.

• Alpha particles were absorbed by the foil.

• Some alpha particles were deflected at large angles, and a few even bounced back.

• Alpha particles caused the foil to emit electrons.

According to Rutherford's atomic model, where is most of the atom's mass located?

• Evenly distributed throughout the atom.

• In the electrons orbiting the nucleus.

• In the dense central nucleus.

• In the empty space surrounding the nucleus.

How did Rutherford's model challenge the previously accepted 'plum pudding' model of the atom?

• It suggested that electrons are stationary.

• It proposed that atoms are indivisible.

• It introduced a central nucleus, contradicting the idea of a uniform positive charge with embedded electrons.

• It denied the existence of electrons.