A circuit was built to test various materials for their resistance to electrical flow.MaterialsV (Volts)I (Amperes)R (Ohms)E1.50.005XF1.50.002XG1.5X500HX0.010150Which of the materials tested offered the greatest resistance to electrical flow?aE bFcG dH

To determine which material offered the greatest resistance to electrical flow, we need to calculate the resistance (R) for each material using Ohm's Law, which states:

$R = \frac{V}{I}$

where:

• $R$ is the resistance in ohms (Ω),
• $V$ is the voltage in volts (V),
• $I$ is the current in amperes (A).

Let's calculate the resistance for each material:

1. Material E:

   • Voltage ($V$) = 1.5 V
   • Current ($I$) = 0.005 A $R = \frac{1.5}{0.005} = 300 \, \Omega$

2. Material F:

   • Voltage ($V$) = 1.5 V
   • Current ($I$) = 0.002 A $R = \frac{1.5}{0.002} = 750 \, \Omega$

3. Material G:

   • Voltage ($V$) = 1.5 V
   • Resistance ($R$) = 500 Ω (given directly)

4. Material H:

   • Voltage ($V$) = X V (not given directly)
   • Current ($I$) = 0.010 A
   • Resistance ($R$) = 150 Ω (given directly)

Now, we compare the resistances:

• Material E: 300 Ω
• Material F: 750 Ω
• Material G: 500 Ω
• Material H: 150 Ω

The material with the greatest resistance is Material F with 750 Ω.

Therefore, the answer is: b) F